Instruction manual

68
Color Space According to the COLOR SPACE Settings
Appendix
Color Space According to
the COLOR SPACE
Settings
The color space of the camera main signal, recorded by the
SR-R4 when connected, is S-GAMUT mode. The color
space of the output signal for the viewfinder and SDI OUT
connectors is converted to ITU-R BT.709 color space.
Colorimetry
1. Virtual chromaticity points at S-GAMUT
The virtual color space at S-GAMUT is shown in the above
chart. The virtual chromaticity points are as follows:
When converting the color space of a video source shot
with this camera in S-GAMUT mode, use these virtual
chromaticity points.
These chromaticity points are “virtual” because they do
not represent the actual, accurate color space but are the
calculated values for calculation of color space conversion.
These virtual chromaticity points have been introduced
because the actual color space cannot be represented as a
triangle in this colorimetry.
The following equation provides a simple conversion from
the color space for S-GAMUT to that for conventional
cameras (HDC-F950, HDW-F900R, etc.):
(Rw, Gw, Bw): RGB values for the original color space for S-GAMUT
(R, G, B): Values after being converted to the color space for
conventional cameras
Use the following equations to convert from S-GAMUT to
another color gamut.
Converting to ITU-R.BT709/sRGB
(Rw, Gw, Bw): RGB values for the original color space for S-GAMUT
(R, G, B): RGB values after conversion
Converting to ACES-GAMUT (American Color
Encoding Space)
• Daylight: 5500K
• Tungsten: 3200K or 4300K
(Rw, Gw, Bw): RGB values for the original color space for S-GAMUT
(R, G, B): RGB values after conversion
Use the following equation to express the S-GAMUT as an
XYZ color space.
(Rw, Gw, Bw): RGB values for the original color space for S-GAMUT
(X, Y, Z): Values after conversion to XYZ color space
2. Color space for film
The color space for film shown in the above chart
represents measurements from VISION Premier Film EK
2393.
xy
R0.73 0.28
G 0.14 0.855
B 0.1 –0.05
y
x
0.8 10.60.40.2
- 0.2
0.2
0.4
0.6
0.8
1
- 0.2
S-GAMUT
Film
DCDM REF PJ
CRT